镀铂钛毡对质子交换膜电解槽的性能优化  

Optimization of Proton Exchange Membrane Electrolyzer Performance with Platinum-Decorated Titanium Felt Porous Transport Layer

作　　者：欧阳韬 杨扬[1,2] 李俊 张亮[1,2] 朱恂[1,2] 叶丁丁[1,2] 廖强[1,2] OUYANG Tao;YANG Yang;LI Jun;ZHANG Liang;ZHU Xun;YE Dingding;LIAO Qiang(School of Energy and Power Engineering,Chongqing University,Chongqing 400030,China;Institute of Engineering Thermophysics,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆大学能源与动力工程学院,重庆400030 [2]重庆大学工程热物理研究所,重庆400030

出　　处：《工程热物理学报》2024年第10期3065-3072,共8页Journal of Engineering Thermophysics

基　　金：国家重点研发计划项目(No.2021YFB4000102);重庆市自然科学基金面上项目(No.CSTB2022NSCQ-MSX1676)。

摘　　要：多孔传输层在质子交换膜电解槽中起到气水分配和电子导通的作用。本文采用快速脉冲电沉积的方法构建了具有均匀纳米花团簇结构的镀铂钛毡,该镀铂钛毡具有较低的阳极气泡黏附性,能有效排除钉扎在钛毡表面的气泡。相较于未处理的商用钛毡,脉冲镀铂钛毡能显著降低电解槽运行过程中的传质损失和欧姆损失,在1.5 A·cm^(-2)的中低电流密度下电解电压低至1.69 V。采用流体体积法对不同润湿特性下的多孔传输层气液流动过程进行了探究,发现超亲水的脉冲镀铂钛毡具有最低的氧气占比和最短的气泡突破时间,能有效排出催化层产生的气泡,减少了电解过程中的传质损失。Porous transport layer plays a crucial role in gas-water distribution and electron conduction in proton exchange membrane(PEM)electrolyzer.In our study,a platinum-decorated titanium felt with uniform flower-shaped nanocluster structure is constructed by fast potential pulse electrodeposition method.The bubble adhesion property is largely optimized for the platinum-decorated titanium felt,which can be effectively removed from its surface.Compared with untreated commercial titanium felt,the pulse platinum-decorated titanium felt can significantly reduce mass transport resistance and ohmic resistance loss.The electrolysis voltage is as low as 1.69 V at 1.5 A·cm^(-2)during the PEM electrolyzer operation.The volume of fluid method is used to explore the gas-liquid flow process in porous transport layer under different wetting characteristics.It is found that pulse platinum-decorated titanium felt with superhydrophilic characteristic has the lowest oxygen proportion and shortest bubble breakthrough time.The bubbles can be effectively removed,and mass transfer limitation effect is minimized in the electrolysis process.

关 键 词：质子交换膜水电解 多孔传输层 脉冲镀铂 传质优化 流体体积法 

分 类 号：TK91[动力工程及工程热物理]